Multiple display problem in OSX 10.9.2

Had same issues where my second monitor was not working correctly. Tried all the usual stuff: zap the power button, pram, safe boot, fix permissions none of which worked. Then low and behold tried unchecking "displays have separate spaces" option within mission control and Bada Bing all is good!

One click away!!!

Thanks for the tip, but didn't work for me! I hope that fix keeps working for you.

Now with 10.9.4 I have again the same problem!!!! What the f.... is with you apple? Besides my second replacement of my new MacBook Pro 2013.

anyone else experiencing the blank thunderbolt display problem again with 10.9.4?

i cant get my 2nd display to work after the update?

yeah, my second display died soon after I install this &$&@@ update, and now I waste my day tried to solve this problem without any sucess.

Second display problem with 10.9.4

I even format my computer all day long, I made a clean install of Mavericks and no joy!

I got this issue escalated with a senior technician in germany. please do so too. the more escalations the better.

Since I used your step here ( sudo mv com.apple.windowserver.plist com.apple.windowserver.plist~orig ), I have only dropped the monitor once in the past week whereas it was doing it 2-3 times a day before. So your suggestion has made the problem bearable for now (knocks on wood).

This seems to have solved my problem or has greatly reduced the problem happening... Instead of 2-3 times a day of monitors getting dropped waking from sleep it has only happened once in the past week.

1. sudo mv com.apple.windowserver.plist com.apple.windowserver.plist~orig
2. restart

Hi amaga, I can't download the AMD* files of dropbox link... is empty. Could you check the link please? I have this problem since many weeks ago and I need solving it... Thank you for you help! =D

Got an email from Apple indicating that this issue is now fixed in Yosemite. As there seem to be several variants of this problem, is there anyone

>> who has been using the Amaga hack <<

that can confirm that Yosemite corrects the issue?

I'd rather not try another "upgrade" which may break "the Amaga hack" unless someone can confirm it works.

(Not having extreme faith in Apple at the moment.)

Well I gave it a try. Upgrade to Yosemite went flawlessly (took a while, but no issues). No monitor issues. Looks like it's fixed.

Apple - you lost a great deal of trust and goodwill on this one. But it looks like it's finally fixed.

Monitor Driver broken with latest Yosemite updates.

It is really a shame and embarrassing for apple.

Has there been any update? this problem is killing me!

I have a Mac Mini connected to an LG 32" monitor, using an HDMI to Thunderbolt connection. My second display is an iMac 2014 connected Thunderbolt to Thunderbolt. I restarted the Mac Mini a couple of days ago and the iMac I'm using as the second display would only display black when using the keyboard assignment, Command/F2 to activate the screen. I reset SMCs, reset the PRAM, switched connections and read every related thread I could find to no avail. I then tried disconnecting my external hard drives. After restart with no external devices connected–Boom! The iMac screen was back with Command/F2. I then re-plugged my outboard USB devices and everything is back to normal.

I am STILL having this issue with my 2016 Macbook Pro with Touchbar. I have 2 32" 4k screens and it takes several minutes of trying plugging them in, unplugging, plugging in different orders, etc. before the actually WORK.

THIS IS RIDICULOUS. I spend 10-15min a day just getting this $4k laptop to work properly. Fix these bugs! Real professionals are tired of these kind of issues!